Volute assembly and range hood

Abstract

The utility model discloses a volute assembly and a range hood, and relates to the technical field of range hoods, the volute assembly is applied to the range hood, the volute assembly comprises a volute body and an air inlet net, and the volute body is provided with an air inlet; the air inlet net comprises an installation ring and an air net body arranged on the installation ring, the air net body is provided with a mesh structure, the installation ring is installed on the edge of the air inlet, and the installation ring is provided with a flow blocking piece close to the edge of the air inlet. According to the technical scheme provided by the utility model, on the basis that the safety requirement is met, smoke enters the volute body more uniformly, the working efficiency of a fan impeller is improved, and the noise of the whole machine is reduced; and through the arrangement of the flow blocking piece, oil liquid is prevented from dripping to a cooking bench from the air inlet net and the volute body.

Description

Technical Field

[0001] The utility model relates to the technical field of range hoods, in particular to a volute component and a range hood. Background Art

[0002] The range hood uses a motor to drive the impeller to rotate at high speed, forming a negative pressure area in the volute, which sucks the oil smoke into the range hood. The range hood needs to meet safety regulations. Currently, an oil net is mainly installed in the range hood case to avoid dangerous accidents when the smoke enters the range hood. When the oil smoke flows through the oil net, large particles of oil smoke are separated and attached to the oil net, reducing the accumulation of oil pollution inside the range hood. However, the oil net has dense mesh holes, large wind resistance, and is easily blocked by oil pollution, which reduces the efficiency of the range hood. Utility Model Content

[0003] The main purpose of the utility model is to propose a volute assembly and a range hood, which aims to make the smoke enter the fan system more evenly, improve the work efficiency of the fan impeller, and reduce the noise of the whole machine on the basis of meeting the safety requirements; and prevent the condensed oil and condensed water (generated by steam cleaning) inside the fan system from flowing out from the gaps and dripping from the air duct of the chassis onto the stove outside the range hood.

[0004] To achieve the above purpose, the volute assembly proposed by the utility model includes:

[0005] A volute body having an air inlet; and

[0006] The air inlet net comprises a mounting ring and a wind net body arranged on the mounting ring, the wind net body is provided with a mesh structure, the mounting ring abuts against the edge of the air inlet, and the mounting ring is also provided with a flow blocking member close to the edge of the air inlet.

[0007] In one embodiment, the edge of the air inlet is folded inwardly to form a skirt, and the baffle is close to the skirt.

[0008] In one embodiment, the flow blocking member has an inner side surface close to the mesh structure and an outer side surface opposite to the inner side surface, and the inner side surface is inclined toward the outer side surface in the extending direction of the flow blocking member.

[0009] In one embodiment, the angle between the inner side surface of the baffle and the extension direction is in the range of 5°-30°.

[0010] In one embodiment, the extension length of the baffle is greater than the length of the skirt, and the length of the baffle is h, 3mm≤h≤9mm.

[0011] In one embodiment, the volute assembly further includes a wind wheel disposed in the volute body, and the distance from the outer surface of the edge of the air inlet to the outer surface of the wind wheel is L, and h and L satisfy 0.35≤h / L≤0.55.

[0012] In one embodiment, the mounting ring is further provided with an arc-shaped air guiding structure extending into the air inlet.

[0013] In one embodiment, the mesh structure includes at least one mesh area, and in the mesh area, the apertures of the meshes are gradually increased from the center of the mesh area to the outside.

[0014] In one embodiment, the wind net body includes a plurality of main radiation strips that are radially distributed outward from the center of the wind net body; and

[0015] A plurality of annular components with the center as the circle center and a gradually increasing radius, each of the annular components is connected to a plurality of the main radiation strips, and the free ends of the plurality of the main radiation strips are respectively connected to the mounting ring.

[0016] The utility model also provides a range hood, comprising:

[0017] A chassis, the chassis having an air duct, and a smoke inlet and a smoke exhaust port communicated with the air duct;

[0018] The volute assembly as described above is arranged in the air duct and has an air inlet connected to the air duct and an air outlet connected to the smoke exhaust port; and

[0019] The fan assembly is arranged in the volute assembly.

[0020] The technical solution of the utility model is achieved by applying an air inlet mesh to the air inlet of the volute body of the range hood; firstly, the range hood can meet the safety requirements, ensure the safe use of the fan, and prevent fingers and other parts from being sucked into the fan; secondly, the mesh structure can weaken the vortex at the air inlet of the fan, so that the smoke enters the fan system more evenly, improves the work efficiency of the fan wheel, and reduces the noise of the whole machine; thirdly, the mounting ring is installed at the edge of the air inlet, and the mounting ring is provided with a flow baffle member abutting the edge of the air inlet, the flow baffle member blocks the gap between the mounting ring and the air inlet, and prevents condensed oil and condensed water (generated by steam cleaning) inside the fan system from flowing out of the gap and dripping from the air duct of the chassis onto the stove outside the range hood. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0022] Figure 1 A schematic structural diagram of an embodiment of a volute assembly provided by the utility model;

[0023] Figure 2 for Figure 1 A partial enlarged view of the middle A;

[0024] Figure 3 for Figure 1 A schematic structural diagram of an embodiment of a middle air inlet screen;

[0025] Figure 4 It is a cross-sectional structural diagram of the air inlet network from another perspective;

[0026] Figure 5 This is a structural diagram of the air inlet network from another perspective.

[0027] Description of Figure Numbers:

[0028] 100. volute assembly; 110. volute body; 111. air inlet; 112. skirt; 120. air inlet net; 130. wind net body; 131. mesh structure; 132. main radiation strips; 133. annular member; 134. avoidance; 140. mounting ring; 150. baffle; 151. inner side; 152. outer side; 160. arc-shaped wind guide structure; 170. wind wheel.

[0029] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0032] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0033] The range hood uses the motor of the fan system to drive the impeller to rotate and generate negative pressure in the volute, thereby sucking external smoke into the range hood chassis and then exhausting it through the volute; the range hood needs to meet safety regulations, and currently an oil net is installed at the smoke hood entrance of the chassis; the air inlet of the volute is open, which is prone to generate large vortices and cause noise.

[0034] See also Figure 1 The utility model proposes a volute assembly 100, which is used for a range hood. An air inlet net 120 is arranged on the air inlet 111 of the volute body 110. The air inlet net 120 has a mesh structure 131, which meets safety regulations. At the same time, the air inlet net 120 is arranged at the air inlet 111 of the volute body 110, which can weaken the vortex at the air inlet 111, so that the smoke enters the fan system more evenly, improves the work efficiency of the fan impeller 170, and reduces the noise of the whole machine.

[0035] See also Figure 3 In one embodiment of the present utility model, the air inlet net 120 includes a wind net body 130, the wind net body 130 includes a mounting ring 140 and the wind net body 130, the wind net body 130 is provided with a mesh structure 131, and the mesh structure 131 is provided at the ring opening of the mounting ring 140, see Figure 2 The mounting ring 140 is mounted on the edge of the air inlet 111 , and the mounting ring 140 is provided with a baffle 150 close to the edge of the air inlet 111 .

[0036] Before the baffle 150 is provided, the oil drips out of the stove from the gap between the mounting ring 140 and the edge of the air inlet 111 under the action of gravity. The baffle 150 is located at the edge of the air inlet 111 to block the dripping oil, thereby solving the above problem.

[0037] The technical solution of the present invention is to apply the air inlet net 120 to the air inlet 111 of the volute body 110 of the range hood; firstly, the range hood can meet the safety requirements, ensure the safe use of the fan, and prevent fingers and other parts from being sucked into the fan; secondly, the mesh structure 131 can weaken the vortex at the fan air inlet 111, so that the smoke enters the fan system more evenly, improve the work efficiency of the fan wheel 170, and reduce the noise of the whole machine; secondly, the baffle 150 abuts against the edge of the air inlet 111 after installation, and blocks the gap between the mounting ring 140 and the air inlet 111, so as to prevent condensed oil and condensed water (generated by steam cleaning) inside the fan system from flowing out of the gap and dripping from the air duct of the chassis onto the stove outside the range hood.

[0038] See also Figure 2 and Figure 3 In this embodiment, air inlets 111 are provided on both the front and rear sides of the volute body 110. The two air inlets 111 are connected to the air duct of the chassis. The volute body 110 is tilted, and the front air inlet 111 is closer to the bottom of the air duct as the entrance of the smoke hood, which can expand the suction range, so that the range hood can absorb the oil smoke generated during cooking more quickly and more comprehensively. In particular, when the cooking area in the kitchen is large or there are multiple stoves, a single air inlet 111 may not be able to fully and effectively absorb the oil smoke.

[0039] The smoke entering the air duct from the entrance of the smoke hood passes through the air inlet net 120 of the volute assembly 100 and is discharged out of the volute; the mounting ring 140 is fixed to the volute body 110 by means of screws or the like, the air inlet 111 of the volute body 110 is annular, and the ring opening of the mounting ring 140 corresponds to the shape of the air inlet 111 of the volute body 110, that is, the ring opening may not be limited to annular; due to installation and process errors, there is a gap between the mounting ring 140 and the volute body 110, such as between the screws and the screw locks, so that the fumes condensed to form condensed oil will drip from the gap under the action of gravity and pass through The air duct drips from the entrance of the smoke hood to the stove; in addition, during the steam cleaning process of the range hood, condensed water will also drip, affecting the quality of the product and the user experience; the baffle 150 is arranged on the inner side of the mounting ring 140. When installed, the baffle 150 is located in the volute body 110 and at the edge of the air inlet 111 of the volute body 110, which is equivalent to being inserted into the air inlet 111, and acts as a barrier between the air inlet 111 and the mounting ring 140 to form a "sealed structure". The simple design of the baffle 150 solves the above problems in a very cost-effective manner.

[0040] See also Figure 4 The baffle 150 has various forms. In order to optimize the function of the baffle 150, the baffle 150 has an inner side surface 151 close to the ring opening, and the inner side surface 151 is inclined along the outer side surface 152 away from the ring opening in the extension direction of the baffle 150.

[0041] See also Figure 2 Specifically, in order to achieve a better blocking effect, the edge of the air inlet 111 is folded inward to form a skirt 112, and the baffle 150 fits the skirt 112, so that a close vertical gap is formed between the skirt 112 and the baffle 150, and the oil can pass through the vertical gap and "turn" before overflowing from the edge of the mounting ring 140 and the volute body 110, further improving the blocking effect. The abutment between the skirt 112 and the baffle 150 is understood as a "joining surface" relationship, just like when tables are joined together, the gap between the two is reduced.

[0042] See also Figure 4 In this embodiment, the baffle 150 is in the form of a convex rib and is integrally arranged with the mounting ring 140. The inner side of the baffle 150 is chamfered, and the inclined inner side surface 151 plays a guiding role. The inclined design can increase the path of the fluid (condensed oil / water) on the surface of the baffle 150. The inclined surface can allow the fluid to flow back into the fan system along the inclined direction and be collected by the oil collecting cup.

[0043] See also Figure 2 Specifically, the angle between the inner side surface 151 and the outer side surface 152 of the baffle 150 ranges from 5° to 30°, and the angle is the angle at which the extension lines of the inner side surface 151 and the outer side surface 152 intersect. In the present embodiment, the angle is 15°, and the angle range of 5° to 20° is selected based on considerations of practicality and efficiency. If the angle is too small (less than 5°), the guiding effect of the baffle 150 is not good. On the contrary, if the angle is too large (greater than 20°), although the blocking effect may be enhanced, the structural strength will be weakened, the assembly will be easily damaged, and the manufacturing difficulty will also be high. In other embodiments, the angle is 5°, 6°, 8°, 10°, 18°, 19°, etc.

[0044] In other embodiments, the outer side surface 152 is a non-planar surface, and the inclined angle of the inner side surface 151 is an angle with the extension line.

[0045] See also Figure 1 Specifically, the extension length of the baffle 150 is greater than the length of the skirt 112, and the length of the baffle 150 is h, 3mm≤h≤9mm.

[0046] In this embodiment, the height of the baffle 150 is 6 mm; in other embodiments, it may be 4 mm, 5 mm, 7 mm, or 8 mm. The limitation of the height of the baffle 150 between 3 mm and 9 mm is to ensure that the baffle 150 can effectively block condensed oil and condensed water without adversely affecting the performance of the range hood, while taking into account the rationality of manufacturing and cost. If the height of the baffle 150 is too low (less than 3 mm), it is difficult to manufacture and the cost is high. If the baffle 150 is too high (greater than 9 mm), it may cause unnecessary resistance to the incoming air and affect the suction efficiency of the fan. A baffle 150 that is too high may also change the direction of the incoming air, causing turbulent airflow, increasing noise, and may reduce the overall performance of the range hood. Moreover, the height range of 3 mm to 9 mm is generally easy to manufacture, and can avoid unnecessary material waste while maintaining structural strength, thereby controlling costs. The height within this range is also easy to install and replace, and it will not be difficult to operate because it is too thin, nor will it be difficult to fix because it is too thick. Moreover, the height range of 3 mm to 9 mm provides a moderate design space, so that the baffle 150 can adapt to range hoods of different models and specifications, and has a certain degree of versatility.

[0047] In this embodiment, the mounting ring 140 is further provided with an arc-shaped air guide structure 160 extending into the air inlet 111. The arc-shaped air guide structure 160 is formed by bending the mounting ring 140 in an arc shape from the edge of the ring opening, and plays the role of a volute air guide ring, which can make the air flow enter the volute body 110 more smoothly and reduce the turbulence at the air inlet 111 of the volute body 110.

[0048] The distance between the outer surface of the edge of the air inlet and the outer surface of the wind wheel is L, and h and L satisfy 0.35≤h / L≤0.55. When h and L are limited to the above range, there is a sufficient distance between the baffle 150 and the wind wheel 170, which will not cause unnecessary resistance to the incoming air, and can also play a blocking role to prevent the air from overflowing from the gap.

[0049] Reference Figure 1 , Figure 3 and Figure 4 There is a certain distance between the arc-shaped air-guiding structure 160 and the flow-blocking member 150, and there is an arc-shaped transition between the arc-shaped air-guiding structure 160 and the blocking strip, which is conducive to the function of the flow-blocking member 150. The smoke and water vapor flow into the volute along the inclined inner side surface 151 during the arc-shaped transition, avoiding accumulation in the gap.

[0050] After installation, the arc-shaped air guide structure 160 will be partially inserted into the inside of the wind wheel 170, so that the smoke passing through the mesh structure 131 enters the fan system more evenly, improving the working efficiency of the wind wheel 170 and reducing the noise of the whole machine. The baffle 150 can reduce the eddy current between the front plate of the volute and the front disk of the wind wheel 170, increase the maximum static pressure, and reduce the noise of the fan system, thereby reducing the noise during the operation of the range hood.

[0051] The difference between the inner diameter of the wind wheel 170 and the outer diameter of the arc-shaped wind guiding structure 160 is 3 mm to 5 mm, which satisfies a certain assembly clearance.

[0052] In order to improve the grease separation degree of the whole machine and avoid grease blocking the mesh, the mesh structure 131 includes at least one mesh area, and the mesh apertures in the mesh area are gradually increased from the center of the mesh area to the outside.

[0053] Reference Figure 3 and Figure 4 Specifically, the wind net body 130 includes a plurality of main radiation strips 132 that are radially distributed outward from the center of the wind net body 130, and a plurality of annular components 133 with the center as the center and the radius gradually increasing. Each annular component 133 is connected to a plurality of main radiation strips 132, thereby forming a mesh structure 131. Between two adjacent main radiation strips 132, the mesh gradually increases in the radial direction, and the mesh can be prevented from being blocked, which can improve the grease separation degree of the whole machine; and the smoke entering the air duct from the exhaust port of the range hood needs to be sucked into the air inlet 111 through the mesh structure 131. The mesh structure 131 can weaken the vortex at the fan air inlet 111, so that the smoke enters the fan system more evenly, improves the work efficiency of the fan impeller, and reduces the noise of the whole machine.

[0054] The mounting ring 140 is connected to the end of the main radiation strips 132; the concentrically arranged and gradually enlarged annular member 133 forms the air net body 130 like a "fan cover", and the air net body 130 is connected to the volute through the mounting ring 140 and fixed on the range hood. In this embodiment, the number of the main radiation strips 132 is nine; the nine main radiation strips 132 are evenly distributed along the center of the air net body 130, the angles of adjacent main radiation strips 132 are the same, and the main radiation strips 132 converge at the small circle at the center of the air net body 130, like an open "umbrella rib". In other embodiments, the number of the main radiation strips 132 can be two, three, five, six, eight, nine, etc.; the main radiation strips 132 can also be unevenly distributed, or slightly different.

[0055] It should be noted that the center of the wind net body 130 refers to the geometric center of the wind net structure, that is, the point where all the main radiation strips 132 and the annular components 133 intersect. The center of the wind net body 130 can be determined by measurement and calculation. First, the intersection of all the main radiation strips 132. Second, the convergence point of all the annular components 133 in the shrinking direction is the center of the wind net body 130.

[0056] The gradually increasing radius of the annular component 133 means that it gradually becomes larger as the distance from the center approaches; the annular component 133 is not limited to being a complete circle; or the edge of the annular component 133 can be continuous and closed or discontinuous and semi-closed; visually it appears as a gradually changing ring.

[0057] The annular components 133 are arranged at intervals along the radiation direction, and the mesh between two adjacent annular components 133 and two adjacent main radiation strips 132 is a "fan". Due to the uniform spacing, the height of the fan remains unchanged, but the bottom surface increases, so the area of ​​the mesh increases successively in the radiation direction.

[0058] The radial distribution means that the main radiation strips 132 extend outward from the center, just like the sun's rays radiate outward from the center of the sun. This distribution has obvious directionality and symmetry, and all the main radiation strips 132 start from a common center point and extend outward in a straight line. You can imagine the spokes of a wheel, which are all connected to the hub and extend toward the rim. In the wind network, this radial distribution helps to evenly disperse the wind force and improve the stability and efficiency of the wind network.

[0059] In this embodiment, the wind net body 130 is connected to the volute body 110 through the mounting ring 140, the mesh structure 131 corresponds to the air inlet 111, the ring opening of the mounting ring 140 is similar in size to the air inlet 111 of the volute body 110, the free ends of the plurality of main radiation strips 132 are respectively connected to the ring openings of the mounting ring 140, and the plurality of main radiation strips 132 converge from the connection to the center to form a gathering part, and the gathering part is higher than the mounting ring 140. The design that the gathering part is higher than the mounting ring 140 means that the gathering part is located at a higher position than the mounting ring 140, which can be determined by directly observing or measuring the relative height of the two.

[0060] Reference Figure 3 Specifically, the height between the surface of the collecting portion and the surface of the mounting ring 140 is H, 9mm≤H≤15mm.

[0061] The arc-shaped volute assembly 100 can create a larger effective air intake area because this layout allows wind to enter the wind network from multiple directions rather than just from one direction. The radial design helps to evenly distribute the incoming wind flow and reduce the possibility of local high-speed wind flow, which can reduce the noise generated by excessive wind speed. In addition, the radial layout reduces the turbulence and eddy currents of the wind flow when entering, which may cause noise. By optimizing the path of the wind flow, the noise level can be reduced.

[0062] The size of the ring mouth is similar to that of the volute air inlet 111, and the converging part in the middle is pulled high so that the mesh structure 131 is in the shape of an arc cover. The design of the arc cover can guide the wind flow to enter the wind net more smoothly and reduce the noise generated by the wind flow hitting the hard edge. The arc-shaped surface helps the wind flow to flow more smoothly, thereby reducing noise. The arc cover can concentrate the wind flow in the central area of ​​the wind net, which can improve the air intake efficiency in this area and increase the air volume. This concentrated wind flow also helps to reduce the turbulence of the wind flow in the edge area, further reducing noise. The design of the arc cover can reduce the reflection noise after the wind flow hits the surface. The curved surface is not as prone to strong reflection as a flat surface, so the overall noise level can be reduced.

[0063] Furthermore, the edge of the ring opening of the mounting ring 140 extends in a direction away from the collecting portion to form an arc-shaped wind guide structure 160. During installation, part of the arc-shaped wind guide structure 160 is embedded in the wind wheel 170 of the fan, reducing the vortex generated by the wind wheel 170 and the volute, which helps the wind flow to flow more smoothly, thereby reducing noise.

[0064] Furthermore, in order to facilitate the installation of equipment and the passing of lines, the mesh structure 131 is provided with an avoidance opening 134 , which separates part of the main radiation strips 132 , and the separated part of the main radiation strips 132 is located between the installation ring 140 and the annular component 133 closest to the installation ring 140 .

[0065] Furthermore, the air net body 130 is provided with a plurality of reinforcing ribs, and the plurality of reinforcing ribs respectively connect the mounting ring 140 and the annular component 133 closest to the mounting ring 140 , and divide the mesh therebetween in equal parts.

[0066] The reinforcing ribs can improve the rigidity and strength of the wind net body 130. The reinforcing ribs help maintain the stability of the mesh structure 131, prevent the mesh from being deformed due to external forces, and ensure the stability and uniformity of the ventilation effect. The reinforcing ribs can also prevent the mesh area from being too large, resulting in poor oil and gas filtration effect.

[0067] Specifically, the reinforcing ribs extend to connect with the arc-shaped wind-guiding structure 160. The arc-shaped wind-guiding structure 160 is the part extending outward from the edge of the mounting ring 140, and it may be deformed or damaged due to the influence of external forces. The extension of the reinforcing ribs to this point can improve the connection strength of the overall structure: after the reinforcing ribs are connected to the arc-shaped wind-guiding structure 160, the connection between the various parts of the wind net body 130 (including the main radiation strips 132, the annular member 133, the mounting ring 140 and the arc-shaped wind-guiding structure 160) can be made stronger, and the overall structure is more stable. As the edge part of the wind net body 130, the arc-shaped wind-guiding structure 160 may be subjected to uneven stress. The extension of the reinforcing ribs helps to disperse these stresses and reduce the risk of damage caused by stress concentration. In addition, if the design of the reinforcing ribs is coordinated with the overall style, it can also increase the aesthetics of the structure and enhance the appearance design of the product.

[0068] Reference Figure 4 Furthermore, the plurality of meshes gradually increasing from the center to the outside formed by the two adjacent main radial strips 132 and the plurality of annular components 133, a first dividing strip is arranged between the two adjacent main radial strips 132, and the first dividing strip divides the plurality of meshes gradually increasing from the center to the outside in half. By arranging the first dividing strip between the two adjacent main radial strips 132 and dividing the meshes gradually increasing from the center to the outside in half, it is possible to ensure that the wind flow passes through each mesh more evenly, thereby improving the overall ventilation efficiency; and the addition of the first dividing strip increases the rigidity of the wind net, and the design of the dividing strip helps to guide the wind flow to flow along a predetermined path, reduce unnecessary turbulence and eddies, and by optimizing the air flow path and reducing turbulence and eddies, the noise level during the operation of the wind net can be reduced.

[0069] Specifically, a second dividing strip is arranged between the main radial strip 132 and the first dividing strip, and the plurality of annular components 133 include an intermediate annular component 133 arranged in the middle of the main radial strip 132 and an end annular component 133 arranged at the outermost side of the main radial strip 132. The second dividing strip connects the intermediate annular component 133 and the end annular component 133, and divides the mesh between the intermediate annular component 133 and the end annular component 133 in half.

[0070] By providing the first and second dividing strips, the mesh sizes between adjacent main radiation strips 132 can be ensured to be consistent, thereby improving the mesh uniformity of the entire wind net body 130. In addition, the presence of the first and second dividing strips can enhance the structural stability of the wind net body 130, reduce vibration and deformation caused by wind force, and improve the service life of the wind net body 130. By precisely controlling the size and distribution of the mesh, the ventilation efficiency of the volute assembly 100 can be optimized, ensuring the uniformity and stability of the wind flow, without making the mesh too large to reduce the filtering effect, or making the mesh dense, resulting in large wind resistance and easy clogging by oil.

[0071] Reference Figure 5 Specifically, the distance between two adjacent annular members 133 is the length d of the defined mesh, 5mm≤d≤10mm. That is, the mesh cannot allow a column with a diameter of d to pass through, that is, the spacing distance between the annular members 322 is d, for example, d is 5mm, 6mm, 7mm, 8mm, 9mm, etc.

[0072] The utility model also proposes a range hood, which includes a chassis, a volute assembly 100, and a fan assembly. The chassis has an air duct, and the air duct includes a smoke inlet and a smoke exhaust port; the volute assembly 100 is arranged in the air duct, and has an air inlet 111 connected to the air duct and an air outlet connected to the smoke exhaust port; the fan assembly is arranged in the volute assembly 100; the mesh structure 131 corresponds to the air inlet 111.

[0073] The specific structure of the volute assembly 100 refers to the above-mentioned embodiment. Since the range hood adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here. Among them, the volute assembly 100 has a mesh structure 131, which not only meets the safety requirements, but also is arranged at the air inlet 111 of the volute body 110, which can weaken the vortex at the fan air inlet 111, so that the smoke enters the fan system more evenly, improves the work efficiency of the fan impeller 170, and reduces the noise of the whole machine. The outer side surface 152 of the baffle 150 is close to the edge of the air inlet 111 and exceeds the edge of the air inlet 111 inward. In this way, the oil smoke inhaled from the mesh structure 131 is blocked by the baffle 150, and flows into the volute along the baffle 150, and does not flow out from the gap between the mounting ring 140 and the volute.

[0074] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A volute assembly for a range hood, characterized in that: The volute assembly comprises: A volute body having an air inlet; and The air inlet net comprises a mounting ring and a wind net body arranged on the mounting ring, the wind net body is provided with a mesh structure, the mounting ring abuts against the edge of the air inlet, and the mounting ring is also provided with a flow blocking member close to the edge of the air inlet.

2. The volute assembly according to claim 1, characterized in that: The edge of the air inlet is folded inwardly to form a skirt, and the baffle is close to the skirt.

3. The volute assembly according to claim 1, characterized in that: The flow blocking member has an inner side surface close to the mesh structure and an outer side surface opposite to the inner side surface, and the inner side surface is inclined toward the outer side surface in the extending direction of the flow blocking member.

4. The volute assembly according to claim 3, characterized in that: The angle between the inner side surface of the baffle and the horizontal is in the range of 5°-30°.

5. The volute assembly according to claim 2, characterized in that: The extending length of the baffle is greater than the length of the skirt, and the length of the baffle is h, 3mm≤h≤9mm.

6. The volute assembly according to claim 1, characterized in that: The volute assembly also includes a wind wheel arranged in the volute body, the length of the flow baffle is h, the distance from the outer surface of the edge of the air inlet to the outer surface of the wind wheel is L, and h and L satisfy 0.35≤h / L≤0.

55.

7. The volute assembly according to claim 1, characterized in that: The mounting ring is also provided with an arc-shaped air guiding structure extending into the air inlet.

8. The volute assembly according to claim 1, characterized in that: The mesh structure includes at least one mesh area, and in the mesh area, the apertures of the meshes are gradually increased from the center of the mesh area to the outside.

9. The volute assembly according to claim 8, characterized in that: The wind net body includes a plurality of main radiation strips that are radially distributed outward from the center of the wind net body; and A plurality of annular components with the center as the circle center and a gradually increasing radius, each of the annular components is connected to a plurality of the main radiation strips, and the free ends of the plurality of the main radiation strips are respectively connected to the mounting ring.

10. A range hood, characterized in that: include: A chassis, the chassis having an air duct, and a smoke inlet and a smoke exhaust port communicated with the air duct; The volute assembly according to any one of claims 1 to 9, wherein the volute assembly is disposed in the air duct and has an air inlet connected to the air duct and an air outlet connected to the smoke exhaust port; and The fan assembly is arranged in the volute assembly.

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